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Full Discussion: Find words containing small letters
Top Forums Shell Programming and Scripting Find words containing small letters Post 302970699 by hhdzhu on Sunday 10th of April 2016 10:20:08 PM
Old 04-10-2016
Quote:
Originally Posted by JhonTheNewbie
Code:
for word in $(<$f1); do
        echo $word | grep "[a-z]"
done

$f1 stores the file name, the problem with my code is that the words are printed on separated lines.
Hi, I think your code is cool but a little tricky,could you explain the meaning of this "$(<$f1)" especially the "<" here,thank you!
 

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LEARN ABOUT BSD

man

MAN(7)							 Miscellaneous Information Manual						    MAN(7)

NAME

       man - macros to typeset manual

SYNOPSIS

       nroff  -man  file ...

       troff  -man  file ...

DESCRIPTION

       These macros are used to lay out pages of this manual.  A skeleton page may be found in the file /usr/man/man.template.

       Any  text  argument  t may be zero to six words.  Quotes may be used to include blanks in a `word'.  If text is empty, special treatment is
       applied to the next input line with text to be printed.	In this way .I may be used to italicize a whole line, or .SM may be followed by .B
       to make small bold letters.

       A  prevailing  indent  distance	is  remembered	between successive indented paragraphs, and is reset to default value upon reaching a non-
       indented paragraph.  Default units for indents i are ens.

       Type font and size are reset to default values before each paragraph, and after processing font and size setting macros.

       These strings are predefined by -man:

       *R    `(Reg)', trademark symbol in troff.

       *S    Change to default type size.

FILES

       /usr/share/tmac/tmac.an
       /usr/man/man.template

SEE ALSO

       troff(1), man(1)

BUGS

       Relative indents don't nest.

REQUESTS

			    Request	 Cause If no	Explanation		 Break Argument .B t	     no    t=n.t.l.*Text t is  bold.   .BI
			    t	     no    t=n.t.l. Join  words  of  t	alternating  bold and italic.  .BR t	    no	  t=n.t.l. Join words of t
			    alternating bold and Roman.  .DT	      no    .5i 1i...Restore default tabs.  .HP  i	  yes	i=p.i.*  Set  pre-
			    vailing  indent  to  i.   Begin  paragraph	with  hanging  indent.	.I t	     no    t=n.t.l. Text t is italic.  .IB
			    t	     no    t=n.t.l. Join words of t alternating italic and bold.  .IP x i      yes   x=""     Same as .TP with tag
			    x.	 .IR  t        no    t=n.t.l. Join  words  of t alternating italic and Roman.  .LP	    yes   -	   Same as
			    .PP.  .PD d        no    d=.4v    Interparagraph distance is  d.   .PP	    yes   -	   Begin  paragraph.   Set
			    prevailing	indent	to  .5i.   .RE		yes   -        End of relative indent.	Set prevailing indent to amount of
			    starting   .RS.    .RB   t	      no    t=n.t.l. Join   words   of	 t    alternating    Roman    and    bold.     .RI
			    t	     no    t=n.t.l. Join  words  of  t	alternating  Roman and italic.	.RS i	     yes   i=p.i.   Start relative
			    indent,  move  left  margin  in  distance  i.    Set   prevailing	indent	 to   .5i   for   nested   indents.    .SH
			    t	     yes   t=n.t.l. Subhead.   .SM  t	     no    t=n.t.l. Text  t  is small.	.TH n c x v m	   yes	    -Begin
			    page named n of chapter c; x is extra commentary, e.g. `local', for page foot center; v alters page  foot  left,  e.g.
			    `4th Berkeley Distribution'; m alters page head center, e.g. `Brand X Programmer's Manual'.  Set prevailing indent and
			    tabs to .5i.  .TP i        yes   i=p.i.   Set prevailing indent to i.  Begin indented paragraph with hanging tag given
			    by next text line.	If tag doesn't fit, place it on separate line.

       * n.t.l. = next text line; p.i. = prevailing indent

7th Edition							 October 22, 1996							    MAN(7)
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